Single transitions C<-->U, G<-->A

Transitions of type типа C<-->G, U<-->A between the second bases connect triplets within octets O₁ - O₈ from top to bottom from left to right, for example: : CCC<--->CUC, CGC<--->CAC.

Fig. 13, b. Single transitions of type C<-->U, G<-->A between the second bases of triplets.